Hi,

What is the best way to accept payments from users in the following scenario:
>Give permanent deposit addresses to 30K users so they can deposit whenever they want.
>Use xpub key to generate the deposit addresses so no private key is on server.
>Easily manage the deposits using a wallet on system

I tried using electrum but it seems it has sync issues with so many addresses.
With core it seems it does not support xpub without the private key.

Any other option?